Whistle.



E. W. SGHURMAN.

WHISTLE. APPLICATION FILED JAN. 25, 1909.

Patented July 2, 1912.

, Ina/mafia", Elias WSchur man;

COLUMBIA PLANOGRAPH CO.,WASH|NGTON. D. c.

iINiTno sTATns PATENT' OFFICE.

ELIAS w. SCI-IURMAN, on BOSTON, MASSACHUSETTS; ASSIGNOR, BY DIRECT ANDMESNE ASSIGNMENTS, To HE RANDALL-FAIGI-INEY COMPANY, or BOSTON, MAS-SAOI-IUSETTS, A ooRroRA-TIoN or MASSACHUSETTS.

WHISTLE.

- Specification of Ilett e rsPatent.

Patented J uly 2, 1912".

Application fileda'l'anuaryi25, 1909.. Serial No. 474,180.

To all whom it may concern:

Be it known that I, ELIAS WV. SOHURMAN, a citizen of the United States,and a resident of the city of Boston, county of Suffolk, andCommonwealth of Massachusetts, have invented certain new and usefulImprovements in Whistles, of which the following is a specification.

The object of this invention is the construction of a whistle designedto be blown by the exhaust from an internal combustion engine, and whichcan not only be rendered either mute or sonorous at a seconds notice,but which can be varied in quality and intensity of tone emitted.

Referring to the drawings forming part of this specification, Figure 1is a side elevation of an exhaust whistle made in accordance with myinvention. Fig. 2 is a side sectional elevation of the same. Fig. 3 is atransverse section on the line XX in Fig. 2.

The reference numeral 1 designates the exhaust pipe terminal of anexplosion engine, or the outlet to any quantity of steam, air or othergas under pressure. This terminal is preferably made rectangular incross-section, as shown in Fig. 8, and is partially cut away at an acuteangle, as in Figs. 1 and 2. Beneath this cut away section is pivoted orhinged a flap 2, which, when brought up into contact with the edges ofsuch section will leave a narrow terminal slit 3 through which theexhaust will issue and by its impinging against the opposing edge A ofthe resonator 5, produces the shrill sonorous vibrations desired.

A spring 6 attached to the flap 2 and suitably anchored keeps the latternormally open, as in Fig. 1, and so permits the exhaust to freely escapewithout affecting the whistle. By suitably connecting this flap to atreadle or lever, such flap can be instantly brought up into its closedposition and the whistle sounded at a moments call. Such connectingmeans is preferably a cord 7 passing down over the pulley 8 to a stirrup9 whose ends engage the eyes 10 of the cross bar 11, as shown in Fig. 3.By varying the position of this flap, as by holding it a short distanceaway from its fully closed position, or by quickly swinging it towardand from its closed position two or more times, the whistle is made toemit either a shrill and loud sound, or a deeper and less intense, orone slurring through a considerable range of high and deep tones. Tofurther increase the Siren-like character of the blast emitted by thiswhistle, I provide the fan-wheel 15 mounted to revolve freely within thesonorous chamber or resonator 5, and having its lowermost fans comingjust within range of the blast from the slit 3. As this fan-wheel doesnot acquire its maximum of velocity for a second or two after thewhistle begins to sound, the quality of the Sound produced will rapidlyvary, and the intensity and pitch will quickly range upward in a mostalarming manner, insuring that no pedestrian will long remain unmovedand inattentive to what is approaching him.

What I claim as my invention and for which I desire Letters Patent is asfollows, to wit 1. A whistle comprising a resonant chamber having anopening through its wall, and a tube having a narrow slit at its endthrough which to direct a blast of gas or the like against an edge ofsaid opening and thereby to generate a sound; a sect-ion of said tubebeing adapted to be opened and closed at will, and one end of saidsection forming one side of said slit, whereby the outward movement ofSaid section not only opens said tube for the escape of the gas, butwidens said slit to further insure the muteness of the whistle.

2. A whistle comprising a resonant chamber having an opening through itswall, a tube having a narrow slit at its end through which to direct ablast of gas or the like against an edge of said opening for theproduction of sound, a section of one side of said tube being pivotallysupported to swing away from the remainder of the tube, the free end ofsaid sect-ion forming one side of said slit, and means for opening andclosing Said section at will.

3. A whistle comprising a resonant chamber having an openlng through itswall, and a tube having a narrow slit at its end through which to directa blast of gas or the like against an edge of said opening, a section ofone side of said tube being pivotally supported at its end opposite tosaid slit,

and formed with lateral right-angled flanges invention, I have hereuntoset hand this adapted to inclose the sides of said tube 19th day ofJanuary, 1909. when in operating position, the free'end of said sectionforming one side of said slit, t ELIAS SOHURMAN' and said section havingmeans operative at Witnesses: Will for opening and closing it. A. B.UPHAM,

In testimony that I claim the foregoing HENRY L. WHI'I'I'LESEY.

(l opies of this patent may be obtained for five cents each,-byaddressing the Commissioner of Patents,

Washington, I). G.

